Узнать вендора гипервизора

#! /usr/env/bin python3
# -*- coding: utf-8 -*-
from ctypes import CFUNCTYPE, POINTER, Structure, addressof, c_uint32, c_void_p
from mmap   import PROT_EXEC, PROT_READ, PROT_WRITE, mmap
from struct import pack
from sys    import maxsize
 
opcodes = bytes([
   0x53,                      # push  rbx
   0x89, 0xf0,                # mov   eax, esi
   0x89, 0xd1,                # mov   ecx, edx
   0x0f, 0xa2,                # cpuid
   0x89, 0x07,                # mov   dword ptr [rdi],      eax
   0x89, 0x5f, 0x04,          # mov   dword ptr [rdi +  4], ebx
   0x89, 0x4f, 0x08,          # mov   dword ptr [rdi +  8], ecx
   0x89, 0x57, 0x0c,          # mov   dword ptr [rdi + 12], edx
   0x5b,                      # pop   rbx
   0xc3                       # ret
] if maxsize > 2**32 else [
   0x53,                      # push  ebx
   0x57,                      # push  edi
   0x8b, 0x7c, 0x24, 0x0c,    # mov   edi, dword ptr [esp + 12]
   0x8b, 0x44, 0x24, 0x10,    # mov   eax, dword ptr [esp + 16]
   0x8b, 0x4c, 0x24, 0x14,    # mov   ecx, dword ptr [esp + 20]
   0x0f, 0xa2,                # cpuid
   0x89, 0x07,                # mov   dword ptr [edi], eax
   0x89, 0x5f, 0x04,          # mov   dword ptr [edi +  4], ebx
   0x89, 0x4f, 0x08,          # mov   dword ptr [edi +  8], ecx
   0x89, 0x57, 0x0c,          # mov   dword ptr [edi + 12], edx
   0x5f,                      # pop   edi
   0x5b,                      # pop   ebx
   0xc3                       # ret
])
 
class CPUID_LEAF(Structure):
   _fields_ = [(x, c_uint32) for x in ('eax', 'ebx', 'ecx', 'edx')]
   @property
   def raw(self):
      return [getattr(self, x) for x, _ in self._fields_]
   @property
   def vendor(self):
      return pack('III', *self.raw[1:]).decode('utf-8')
 
class CPUID(object):
   def __init__(self):
      self.memo = mmap(-1, len(opcodes), prot=PROT_EXEC | PROT_READ | PROT_WRITE)
      self.memo.write(opcodes)
      self.addr = c_void_p.from_buffer(self.memo)
      self.func = CFUNCTYPE(None, POINTER(CPUID_LEAF), c_uint32)
   def __call__(self, lp):
      self.func(addressof(self.addr))((block := CPUID_LEAF()), lp)
      return block
   def __del__(self):
      del self.addr
      self.memo.close()
 
cpuid = CPUID()
print(cpuid(0x40000000).vendor if cpuid(1).raw[2] >> 31 else 'Not present')